X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=blobdiff_plain;f=rockets%2Fresearch%2Ftest1.mdwn;h=3b1ab6ba45e88380e564631d9836277252847a2f;hp=a57bebc469e0f6fb92a1dae985de5c3d1642f341;hb=b741d1a32d9390b08a72bc388094a00713b576a3;hpb=8d4f422f5d26df4b764f173a4ab16c73c09b9e2d

diff --git a/rockets/research/test1.mdwn b/rockets/research/test1.mdwn
index a57bebc..3b1ab6b 100755
--- a/rockets/research/test1.mdwn
+++ b/rockets/research/test1.mdwn
@@ -21,6 +21,8 @@ good grain after saw / knife kerfs.
 
 ## Formula ##
 
+Since we need 177 grams, let's make 200 grams of propellant in this batch.
+
 * 65% Potassium Nitrate	(130g)
 * 35% Sorbitol (70g)
 * 1% Red Iron Oxide, added post-melt (2g)
@@ -28,6 +30,8 @@ good grain after saw / knife kerfs.
 
 ## Process ##
 
+The grains were cast on 30 May 2015.
+
 We measured out the potassium nitrate and sorbitol into a sealable plastic
 container and shook vigorously to break up the clumps in the sorbitol and
 get a good physical mix.  
@@ -56,3 +60,14 @@ actually.
 
 About 4 hours later, the card stock was pulled off the test strand, which
 proved to still be a bit on the pliable and "tacky" surface side.
+
+## Observations ##
+
+After casting, further reading on Nakka's site indicates initial melt is
+at about 91C, or 196F.  Fully melted at 125C, or 257F.  Discoloration at
+175C, or 347F.
+
+Nakka says wait 24 hours before trying to pull the core rod.  The propellant 
+will remain pliable after cooling, thus can be deformed if handled sooner. 
+
+